52215647 has 4 divisors (see below), whose sum is σ = 56962536. Its totient is φ = 47468760.

The previous prime is 52215643. The next prime is 52215661. The reversal of 52215647 is 74651225.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52215647 - 2² = 52215643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52215641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2373428 + ... + 2373449.

It is an arithmetic number, because the mean of its divisors is an integer number (14240634).

Almost surely, 2^52215647 is an apocalyptic number.

52215647 is a deficient number, since it is larger than the sum of its proper divisors (4746889).

52215647 is a wasteful number, since it uses less digits than its factorization.

52215647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4746888.

The product of its digits is 16800, while the sum is 32.

The square root of 52215647 is about 7226.0395099944. The cubic root of 52215647 is about 373.7663687122.

The spelling of 52215647 in words is "fifty-two million, two hundred fifteen thousand, six hundred forty-seven".